Restrict users to certain domain on ZCS 8.0

For 7 version and previous if I found a solution, but version 8 is totally different in configuration files .......
I am preparing a demo for my superiors to switch to ZCS Professional Edition and need an environment where some users can not send mail to the outside and others however if they can .....
Can anyone give me a solution ....

For 7 version and previous if I found a solution, but version 8 is totally different in configuration files .......
I am preparing a demo for my superiors to switch to ZCS Professional Edition and need an environment where some users can not send mail to the outside and others however if they can .....
Can anyone give me a solution ....

Go to the wiki and search for the word "restrict" (you should also search the forums).

Thanks Phoenix, but that I've done before opening the thread, I had already seen your responses in other threads (always the same), and a forum with over 22,000 threads and hundreds of possible solutions is difficult to handle.
But the solutions I have found only serve to version 7 and above (v6, v5) .....
Here I leave one Restrict users to certain domain - Zimbra :: Wiki
What I'm looking for is a solution for Zimbra 8.0 in which only certain users can send mail to localhost and others however have no restrictions.

I can not follow the procedure described in the Wiki for rel. 8. I followed in the past for my prvs. rel. 7.

Any help?

If You Followed following for ZCS 7.x and earlier , then please note ...

RestrictPostfixRecipients - Zimbra :: Wiki setting restrictions , the you need to ensure that the File which was referred
as /opt/zimbra/conf/postfix_recipient_restrictions.cf in ZCS 7.x and earlier is now at
/opt/zimbra/conf/zmconfigd/postfix_recipient_restrictions.cf and zmmta.cf options are now in /opt/zimbra/conf/zmconfig.d with new Verwsion of ZCS 8.x

zmmta.cf is Not there. This Options are now in /opt/zimbra/conf/zmconfigd.cf . But This is not to be manually edited.You need
to use postconf, zmlocalconfig and such command to set correct parameters , so the settings remain persistent.

Now add your new restriction to the top of postfix_recipient_restrictions.cf
vi /opt/zimbra/conf/postfix_recipient_restrictions.cf

[paste this into the first line of the file, above any other settings]
check_recipient_access hash:/opt/zimbra/postfix/conf/protected_recipients
Edit /opt/zimbra/conf/zmmta.cf and then remove the following line;
# POSTCONF smtpd_recipient_restrictions FILE postfix_recipient_restrictions.cf